
Use the basic calculator on Mac
You can perform simple arithmetic calculations with a basic calculator.

If your Mac has a Touch Bar, you can easily do quick calculations — without even moving the pointer.
Siri: Say something like: “What’s 74 times 9?” or “What’s 18 per cent of 225?” Learn how to use Siri.
Tip: To learn a key’s function, hold the pointer over the key to see its help tag.
Switch to the basic calculator
- Go to the Calculator app  on your Mac. on your Mac.
- Do one of the following: - Choose View > Basic in the menu bar. 
- While using the scientific or programmer calculator, click  , then choose Basic. , then choose Basic.
- Press Command-1. 
 
Clear the display
- Go to the Calculator app  on your Mac. on your Mac.
- Enter a digit or calculation. 
- Do one of the following: - Delete the expression: Click the All Clear (AC) key, or click and hold  . .
- Delete the last digit: If you make a mistake when you enter a number, click  . .
 
Round results or increase precision
When you round your results, Calculator stores the full value and displays the rounded value.
- Go to the Calculator app  on your Mac. on your Mac.
- Choose View > Decimal Places in the menu bar, then choose the number of digits you want to show after the decimal. - Trailing zeros never appear. 
Note: Use caution when rounding, as your results may not be as precise as they should be. For example, the calculator returns 10 (rather than 9.9) when you enter “99 ÷ 10 =” with decimal places set to zero.
Show commas in large numbers
- Go to the Calculator app  on your Mac. on your Mac.
- Choose View > Show Thousands Separators in the menu bar. 
Tip: You can also perform calculations — and dictate them — in Spotlight on Mac. See Search for anything with Spotlight.